Microsilica is a sort of tiny pozzolana with high-active silicon dioxide.

硅灰是一种极细的火山灰质的高活性二氧化硅。

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The acid leaching residue is studied by X ray diffraction analysis and IR spectrometry and the results show that it mainly consists of active silicon dioxide.

酸浸渣经X-射线衍射和红外光谱分析表明，其主要成分为具有活性的二氧化硅。

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Active bauxite, silicon dioxide, diatomaceous earth and ash have been found suitable for alkali removal from hot flue gas in a coal conversion system.

活性矾土、二氧化硅、硅藻土及煤灰对高温烟气中碱金属的脱除都有一定的效果。

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The system the researchers tested used a type of solar cell known as dye-sensitized solar cells, a lightweight and inexpensive type where the active layer is composed of titanium dioxide, rather than the silicon used in conventional solar cells.

FORBES: A More Efficient Solar Cell--Built By A Virus